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Diffstat (limited to 'drivers/thermal/gov_user_space.c')
-rw-r--r--drivers/thermal/gov_user_space.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/thermal/gov_user_space.c b/drivers/thermal/gov_user_space.c
new file mode 100644
index 000000000..8bc1c22aa
--- /dev/null
+++ b/drivers/thermal/gov_user_space.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * user_space.c - A simple user space Thermal events notifier
+ *
+ * Copyright (C) 2012 Intel Corp
+ * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/slab.h>
+#include <linux/thermal.h>
+
+#include "thermal_core.h"
+
+static int user_space_bind(struct thermal_zone_device *tz)
+{
+ pr_info_once("Consider using thermal netlink events interface\n");
+
+ return 0;
+}
+
+/**
+ * notify_user_space - Notifies user space about thermal events
+ * @tz: thermal_zone_device
+ * @trip: trip point index
+ *
+ * This function notifies the user space through UEvents.
+ */
+static int notify_user_space(struct thermal_zone_device *tz, int trip)
+{
+ char *thermal_prop[5];
+ int i;
+
+ lockdep_assert_held(&tz->lock);
+
+ thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
+ thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
+ thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip);
+ thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
+ thermal_prop[4] = NULL;
+ kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
+ for (i = 0; i < 4; ++i)
+ kfree(thermal_prop[i]);
+
+ return 0;
+}
+
+static struct thermal_governor thermal_gov_user_space = {
+ .name = "user_space",
+ .throttle = notify_user_space,
+ .bind_to_tz = user_space_bind,
+};
+THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);